Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: March 25, 2024

Abstract Understanding of fundamental mechanism and kinetics the oxygen evolution reaction (OER) is pivotal for designing efficient OER electrocatalysts owing to its key role in electrochemical energy conversion devices. In past few years, lattice oxidation (LOM) arising from anodic redox chemistry has attracted significant attention as it involves a direct O─O coupling thus bypasses thermodynamic limitations traditional adsorbate (AEM). Transition metal‐based oxyhydroxides are generally acknowledged real catalytic phase alkaline media. particular, their low‐dimensional layered structures offer sufficient structural flexibility trigger LOM. Herein, comprehensive overview provided recent advances anion LOM‐based electrocatalysts. Based on analyses electronic structure LOM, strategy proposed activate Possible identification techniques corroboration also reviewed. addition, reconstruction process induced by LOM focused importance multiple situ/operando characterizations highlighted unveil chemical origins To conclude, prospect remaining challenges future opportunities presented.

Language: Английский

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Proton transfer mediator for boosting the current density of biomass electrooxidation to the ampere level

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(4), P. 1603 - 1611

Published: Jan. 1, 2024

Phosphate can be employed as a hydrogen transfer mediator to accelerate the PCET process of HMF dehydrogenation, and Ru, high valence metal, reduce band gap improve charge efficiency.

Language: Английский

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5‐Hydroxymethylfurfural and its Downstream Chemicals: A Review of Catalytic Routes

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(37)

Published: May 29, 2024

Abstract Biomass assumes an increasingly vital role in the realm of renewable energy and sustainable development due to its abundant availability, renewability, minimal environmental impact. Within this context, 5‐hydroxymethylfurfural (HMF), derived from sugar dehydration, stands out as a critical bio‐derived product. It serves pivotal multifunctional platform compound, integral synthesizing various chemicals, including furan‐based polymers, fine biofuels. The high reactivity HMF, attributed highly active aldehyde, hydroxyl, furan ring, underscores challenge selectively regulating conversion obtain desired products. This review highlights research progress on efficient catalytic systems for HMF synthesis, oxidation, reduction, etherification. Additionally, it outlines techno‐economic analysis (TEA) prospective directions production chemicals. Despite significant catalysis research, certain process routes demonstrating substantial economics, with key indicators surpassing petroleum‐based products, gap persists between fundamental large‐scale industrialization. is lack comprehensive engineering bio‐based making commercialization distant goal. These findings provide valuable insights further field.

Language: Английский

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Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 27, 2024

Abstract Electrochemical water splitting is a promising technique for the production of high‐purity hydrogen. Substituting slow anodic oxygen evolution reaction with an oxidation that thermodynamically more favorable enables energy‐efficient Moreover, this approach facilitates degradation environmental pollutants and synthesis value‐added chemicals through rational selection small molecules as substrates. Strategies small‐molecule electrocatalyst design are critical to electrocatalytic performance, focus on achieving high current density, selectivity, Faradaic efficiency, operational durability. This perspective discusses key factors required further advancement, including technoeconomic analysis, new reactor system design, meeting requirements industrial applications, bridging gap between fundamental research practical product detection separation. aims advance development hybrid electrolysis applications.

Language: Английский

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High‐Surface Area Mesoporous Sc₂O₃ with Abundant Oxygen Vacancies as New and Advanced Electrocatalyst for Electrochemical Biomass Valorization

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 15, 2024

Abstract Scandium oxide (Sc 2 O 3 ) is considered as omnipotent “Industrial Ajinomoto” and holds promise in catalytic applications. However, rarely little attention paid to its electrochemistry. Here, the first nanocasting design of high‐surface area Sc with abundant oxygen vacancies (mesoporous V ‐Sc for efficient electrochemical biomass valorization reported. In case electro‐oxidation 5‐hydroxymethylfurfural (HMF) 2,5‐furandicarboxylic acid (FDCA), quantitative HMF conversion, high yield, faradic efficiency FDCA via hydroxymethylfurancarboxylic pathway are achieved by this advanced electrocatalyst. The beneficial effect on electrocatalytic performance mesoporous revealed enhanced adsorption reactants reduced energy barrier process. concerted design, situ ex experimental studies theoretical calculations shown work should shed light rational elaboration electrocatalysts, contribute establishment a circular carbon economy since bio‐plastic monomer green hydrogen efficiently synthesized.

Language: Английский

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Integrated electrochemical and chemical system for ampere-level production of terephthalic acid alternatives and hydrogen

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 14, 2024

Language: Английский

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Photocatalytic upgrading of 5-hydroxymethylfurfural – aerobic or anaerobic?

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(6), P. 2949 - 2966

Published: Jan. 1, 2024

Aerobic photocatalysis generates ROS to oxidise HMF into DFF and FDCA with co-production of H 2 O that potentially induce over-oxidation. Anaerobic enables ambient oxidation simultaneous HER, or hydrogenation BHMF.

Language: Английский

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Self-supporting highly branched urchin-like NiCoP/NiFeP heterostructures as efficient bifunctional electrocatalyst for overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 687, P. 24 - 35

Published: Feb. 8, 2025

Language: Английский

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5-Hydroxymethylfurfural Oxidation in Scaled Anion Exchange Membrane Electrolyzer with NiCuO_x Catalyst

ACS Energy Letters, Journal Year: 2025, Volume and Issue: 10(1), P. 571 - 578

Published: Jan. 2, 2025

The utilization of anion exchange membrane (AEM) electrolyzers presents an opportunity for commercial production 2,5-furandicarboxylic acid (FDCA) through electrochemical oxidation 5-hydroxymethylfurfural (HMF). Consequently, developing facile synthesis techniques scaled-up electrocatalysts HMF reaction (HMFOR) is a crucial step. Herein, we developed one-step soaking method preparing 100 cm2 NiCu-based catalyst on Ni foam (NiCuOx/NF) in 10 s. In single-pass 25 AEM electrolyzer assembled by the obtained catalyst, high yield ≥95.0% and selectivity ≥99.9% were achieved to produce FDCA continuously with 200 mM electrolyte. After h stable operation at A, 207.28 g was attained purity over 99%. This work provides valuable insights into industrial-scale commercialization biomass upgrading electrolyzers.

Language: Английский

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Bio-inspired proton relay for promoting continuous 5-hydroxymethylfurfural electrooxidation in a flowing system

Energy & Environmental Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A ligand-modified catalyst, Ni(OH) 2 –TPA, is synthesized for efficient HMF oxidation, wherein the uncoordinated carboxylate functions as proton relay center, enabling continuous oxidation in a flowing system.

Language: Английский

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